Loudspeaker Upper Plate Coupling via Bent Insertion Part
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Solution Overview
Problem
Conventional loudspeakers face challenges in reducing weight and material usage while maintaining coupling strength, which hinders weight reduction and resource saving, especially in car-mounted devices where material efficiency is crucial for environmental preservation and cost-effectiveness.
Innovation Solution
The loudspeaker design incorporates a frame with a through hole and an insertion part on the upper plate that is bent to couple with the frame, allowing for increased coupling strength while enabling the upper plate to be thinner, thus reducing weight and material usage, and utilizing resin or metal for the frame to enhance strength and thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the upper plate is made thinner to reduce weight, then weight reduction is achieved, but coupling strength between the upper plate and frame deteriorates
Solution Approach 1:
The insertion part extends in the thickness direction (Z-axis) to penetrate through the frame, transforming a two-dimensional surface connection into a three-dimensional spatial interlocking structure. This dimensional extension allows the thin upper plate to achieve sufficient coupling strength through the bent insertion part that anchors into the frame's through hole.
Solution Approach 2:
The insertion part is inserted into the through hole of the frame, creating a nested configuration where the upper plate's insertion part is housed within the frame's through hole space. This nesting arrangement maximizes the use of available space and achieves strong mechanical coupling without increasing the overall thickness of the upper plate.
2Strength
If traditional joining methods are used to ensure coupling strength, then coupling strength is maintained, but manufacturing complexity and assembly time increase
Solution Approach 1:
The upper plate is segmented into a main body and a separate insertion part that extends through the frame. This segmentation allows the insertion part to be independently designed and formed with bending capabilities, enabling simple insertion and bending operations without complex joining mechanisms.
Solution Approach 2:
The bent insertion part automatically anchors itself within the frame's through hole through its own elastic deformation, eliminating the need for external fasteners, adhesives, or complex joining mechanisms. The structure serves its own joining function through the inherent elasticity of the bent insertion part.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves a balance of increased coupling strength, reduced weight, and resource savings, leading to a lighter, more reliable, and cost-effective loudspeaker with improved power linearity and resistance to high input voltages, while minimizing assembly time and material waste.
Implementation Method 1
A part of the insertion part that penetrates the frame is bent
Implementation Method 2
The center pole and the upper plate have a magnetic gap formed therebetween. One end of the voice coil is coupled with the diaphragm, the other end is inserted in the magnetic gap
Data Source
AI summary
A magnetic circuit includes an upper plate, a magnet, a lower plate, and a center pole. The outer circumference of a frame is coupled with a diaphragm. One end of a voice coil is coupled with the diaphragm, and the other end is inserted into a magnetic gap formed between the upper plate and the center pole. The frame is provided with a through hole. An insertion part provided on the outer circumference of the upper plate is inserted into the through hole. The frame is coupled with the upper plate by bending the insertion part.